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Leopard Reference Library: Hardware & Drivers
Mac OS X supports the major networking protocols and services and provides APIs that software developers can use to access network configurations, drive networking devices, or modify the functionality of networking stacks. Hardware developers can use Mac OS X networking services to design networking devices that are compatible with Apple products.

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Allocating and sharing memory with user space from an I/O Kit driver (HTML) (日本語 HTML)
QA1197: Describes the preferred technique for allocating and sharing buffers in an I/O Kit kernel driver.
Technical Q&As 2008-10-13
Are the Name Registry device tree nodes unique? (HTML)
Deprecated - HW64: Discusses whether Name Registry nodes copied from the Open Firmware device tree are unique.
Technical Q&As 1999-10-11
Bonjour enforces the service type format in Panther (HTML)
QA1198: Explains why registering a Bonjour service might fail on Panther.
Technical Q&As 2004-03-23
BSDLLCTest (HTML) (DMG) (ZIP)
Program sample demonstrates how to send and receive raw LLC Ethernet packets.
Sample Code 2003-06-12
Building Universal I/O Kit Drivers (HTML)
TN2163: How to build a universal I/O Kit kernel driver while avoiding common pitfalls.
Technical Notes 2008-08-18
CCL Modem Scripting Guide (HTML) (PDF)
Guides 2007-06-28
CCL Modem Scripting Release Notes (HTML)
Explains changes to modem CCLs for Mac OS X v10.5 and what to do to change existing and supersede older scripts.
Release Notes 2007-10-31
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
Technical Q&As 1997-03-14
The "chosen" node in the device tree (HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
Technical Q&As 2000-09-05
Discovering all advertised Bonjour service types (HTML)
QA1337: Explains how to discover all Bonjour service types being advertised on the local network.
Technical Q&As 2004-06-01
The dreaded "incompatible flag -framework" error (HTML)
QA1096: Explains how to eliminate the incompatible flag -framework error in Project Builder.
Technical Q&As 2001-12-05
enetlognke (HTML) (DMG) (ZIP)
Interface filter based on supported Kernel Programming Interfaces for Tiger.
Sample Code 2005-08-10
ExpressCard Prevents System Sleep (HTML)
QA1517: Describes how some ExpressCard cards can prevent system sleep and how to fix the problem.
Technical Q&As 2007-02-28
Generating a Non-Maskable Interrupt (NMI) (HTML) (日本語 HTML)
QA1264: Explains how to generate a non-maskable interrupt (NMI) on modern Macintosh systems.
Technical Q&As 2008-10-13
GetMACAddressSample (HTML) (DMG) (ZIP)
Demonstrates how to retrieve the MAC address for each Ethernet interface from the Mac OS X I/O Registry.
Sample Code 2003-01-14
GetPrimaryMACAddress (HTML) (DMG) (ZIP)
Demonstrates retrieving the MAC address of the built-in Ethernet controller. Useful for uniquely identifying a Macintosh system.
Sample Code 2005-10-27
GetSetOptions (HTML) (DMG) (ZIP)
Demonstrates a variety of uses of Open Transport's option management routines.
Sample Code 2003-01-14
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Technical Q&As 2008-06-03
GridCalendar (HTML) (DMG) (ZIP)
Demonstrates how to add a custom job submission UI to the GridSample project.
Sample Code 2005-06-01
How to use the OT modem script engine (HTML) (日本語 HTML)
Deprecated - NW50: Shows how to use the Open Transport modem script engine.
Technical Q&As 1997-07-11
I/O Kit Framework Reference (HTML)
Describes the I/O Kit classes that support non-kernel access to I/O Kit objects through the device-interface mechanism.
Reference 2009-03-04
Installing an I/O Kit KEXT Without Rebooting (HTML)
QA1319: Describes the state of the art of installing I/O Kit kernel extensions (KEXTs) without requiring a restart.
Technical Q&As 2003-10-28
IODeviceTree and the I/O Registry (HTML) (日本語 HTML)
QA1120: Describes the IODeviceTree plane in the Mac OS X I/O Registry.
Technical Q&As 2008-09-18
IOKit Framework Headers (HTML) (日本語 HTML)
QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
Technical Q&As 2002-01-15
Issues with boot time KEXT loading (HTML) (日本語 HTML)
QA1087: Explains how to solve problems with loading KEXTs at boot time.
Technical Q&As 2004-01-15
Kernel Framework Reference (HTML)
Describes the APIs and classes (including I/O Kit families) that support kernel-resident device drivers.
Reference 2009-01-06
Mac OS X Server Security Configuration Guide (PDF)
Describes how to configure Mac OS X Server to enhance server and service security.
Guides 2008-06-09
Making sense of IOKit error codes (HTML) (日本語 HTML)
QA1075: Explains how to interpret I/O Kit error codes.
Technical Q&As 2002-02-07
Mixing link-local IP addresses and routable IP addresses (HTML)
QA1357: Explains how to enable communication between devices with link-local addresses and devices with routable addresses.
Technical Q&As 2005-07-06
Network Device Driver Programming Guide (HTML) (PDF)
Background and task information about developing network drivers for Mac OS X.
Guides 2008-03-11
Network Kernel Extensions (legacy) (HTML) (PDF)
Describes how to write a kernel extension for adding or modifying functionality of a networking stack (Mac OS X 10.3 and earlier).
Guides 2006-10-03
Network Kernel Extensions Programming Guide (HTML) (PDF)
Describes how to write a kernel extension for adding or modifying functionality of a networking stack (Mac OS X 10.4 and later).
Guides 2009-03-02
NoCopyReceives (HTML) (DMG) (ZIP)
Demonstrates using no-copy receives under Open Transport.
Sample Code 2003-01-14
Open Transport STREAMS FAQ (HTML)
Deprecated - TN1117: Decribes writing STREAMS modules and drivers for use with Open Transport.
Technical Notes 1997-12-01
OTScheduleDeferredTask When Task Running (HTML) (日本語 HTML)
NW52: Describes what happens when you use OTScheduleDefferedTask to schedule a task that is running.
Technical Q&As 1997-10-13
The "packages" node in the device tree (HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
Technical Q&As 2006-02-22
Power Management; Policy Maker vs. Power Controller (HTML) (日本語 HTML)
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
Technical Q&As 2002-02-13
Registering a Bonjour service multiple times (HTML)
QA1311: Explains why registering the same Bonjour service twice on the same machine doesn't cause a name conflict.
Technical Q&As 2003-10-23
The state of mDNSResponder (HTML)
QA1339: Explains how to obtain information regarding the internal state of mDNSResponder.
Technical Q&As 2006-10-03
T_DATA_REQ vs M_DATA TPI Message Blocks (HTML) (日本語 HTML)
NW42: Explains why OT passes data to a TPI module using M_DATA message blocks instead of M_PROTO+T_DATA_REQ.
Technical Q&As 1996-10-25
TCP/IP Option Sizes (HTML) (日本語 HTML)
NW62: Enumerates the TCP/IP options and their sizes for Open Transport.
Technical Q&As 1999-04-26
tcplognke (HTML) (DMG) (ZIP)
Demonstrates a TCP socket filter based on supported Kernel Programming Interfaces for Tiger
Sample Code 2006-11-27
Understanding and Debugging Kernel Panics (HTML) (日本語 HTML)
TN2063: Addresses kernel panics: what they are and how to debug the code that caused the panic.
Technical Notes 2008-08-14
What are configuration variables in Open Firmware? (HTML) (日本語 HTML)
HW38: Defines the configuration variables in Open Firmware.
Technical Q&As 1999-02-15
What are snag keys in Open Firmware? (HTML) (日本語 HTML)
HW35: Explains Open Firmware snag keys, including examples of their function.
Technical Q&As 1999-02-15